what is the thing, people worry, what if it hit a major city in the united states or elsewhere without any warning, the kind of damage that we could suffer would be devastating. >> yeah, i mean, if you look at the history of meteorites getting hit. a woman got hit in the arm. but the reflection of the fact that the earth's surface is relatively underpopulated and so, most of these asteroids that, like the one in russia, hit in an ocean somewhere. >> megyn: so you like our odds, but, you know, let me ask you this. i hear that you like our odds, but when i use today practice law we use today say i don't get paid to look at that situation and say, that will never happen. i get paid and say it's going to happen and how do i prevent it. that's what you, geniuses in physics get paid to do. is there a way. people in america sitting here, hearing about the billions of particles out there and the relatively undeveloped ability to protect them beforehand, is there anything people are working on? is there something outside of nasa? >> well, i think the major program right now is nasa's program an